We have been placed on blacklists. I have asked to be removed, however I want to hunt down the Machine on my network that may be infected. I am running anti-virus and spam blocker software, but somehow I still got blacklisted. any tools out there to help me hunt down the guilty Machine??

3 Replies

If you are running some kind of firewall software, try to find out from which machine port 25 traffic is coming.

Are you hosting your own email server? Check the logs for the email server to see if it's being used internally or as an open relay. You may want to see if your system is an open relay by checking it with an online service. Use your favourite search engine to look for "open relay test". Open relays are used by spammers to send messages through your system. You then get blacklisted because the mail appears to be coming from your system.

It's also possible that the email never originated from your networks and it's a spammer that is just pretending to be from your networks. In which case there is nothing you can do to stop them. You just have to apply to the authority that has black listed you and plead your case.